Rotary pump



Patented Nov. il, 1924,

il TS JOHN C. PACKARD, OF DENVER, COLORADG, SSIS-NCF, T THE ROTARY PUMP COM- PANY, A CORPORATION OF COLOR-ADO.

ROTARY PUMP.

Application filed October 6, 1921. Serial No. 505,830.

To all whom t may cof/wem.'

Be it known that I, JOHN C. PACKARD, a citizen of the United States, residing at Denver, in the county of Denver and State of Colorado, have invented certain new and useful Improvements in Rotary Fumps; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others slnlled in the art to which it appertains to malte and use the same.

This invention relates to improvements 1n rotary pumps and more particularly it relates to a structure tending to reduce friction and eliminate waste in pumps ot this character.

The present invention is particularly adapted for use in rotary pumps of the type described in my co-pending application., Serial No. 475,128, iiled June e, 1921, to which reference is hereby made. Generally speaking, the device consists of a casing having a cylindrical chamber formed therein with a rotary member mounted eccentrically in the chamber, said rotary member being provided with pockets and abutment members pivoted in said pockets adapted to swing therefrom to Contact parts of the cylindrical surface of the casing. a

The object of the present invention 1s to lprovide means by which friction is reduced between the abutment members and the cylindrical surface of the casing and also between the abutment members and contacting parts of the pockets, while at the same time, the contact between the abutment members and the casing is made more nearly water tight. Further objects will more particularly appear in the following description.

The present invention consists in the novel construction, arrangement and combination of parts as hereinafter more particularly described and claimed.

Two sheets of drawings accompany this specification, as part thereof, in which like reference characters indicate similar parts throughout.

Fig. l is a side elevation of a rotary pump embodying my invention, having one end closure removed and parts being broken away to more clearly illustrate the invention;

Fig. 2 is an elevation of one of the abutment members; 4

.Fig 3 is a plan view of one of the guiding disks;

Fig. t is a transverse sectional view taken on the line 41E- 4f of Fig. 3.

Referring to the drawings, A represents the pump casing having an inlet at B,a substantially cylindrical chamber' @,and an` outlet at D. A rotor E. is eccentrically mounted in chamber C as upon shaft F, the rotor E being provided with a plurality of peripheral pockets G. Substantially*central of the casing and adjacent the inlet opening B is an abutment I-I, and extending from the abutment II almost to the top ofoutlet D.

are crescent-shaped guide members I, the inner surfaces of which extend from the cylindrical face of chamber C to the upper face of abutment H.

Pivoted in each of the pockets G of rotor E and extending transversely of the chamber C are abutment members l The present invention relates particularly to the novel and improved structure of the abutment members J. These members are substantially V-shaped in cross section, having one edge formed into a roller 3 adapted to be received and fitted in a co-mating groove of the rotor E. Each of the other two edges of the abutment member J is provided with a groove adapted to seat rollers l and 2. The roller edge 3 and the rollers l and 2 are each made slightly longer than the rotor E and disks l are provided one for each end of rotor E to maintain the abutment members and the said rollers in proper position. The disks 4 are adapted to rotate with rotor E in suit* able annular slots 5 provided in the casing adjacent each end. The disks l are provided with holes 6 adapted to receive the ends of the roller edge 3 and with circular slots 7, 7 adapted to receive the ends of rollers l and 2 respectively. Other holes 8 are provided for screws to secure the disks to the rotor E. The curved slots 7 7 are so arranged relative to bearings 6 as to permit the abutment members J to pivot on roller edge 3 in bearings 6 and to swing inwardly into the pockets as illustrated in the position or out of the pockets into posit-ion y (see Fig. l). During the entire movement of the abutment members J either into or out from the pockets, the roller 2 will contact continuously with the inner abutment face of pockets (r, while the roller l is successively in eng'agementr with the cylindrical surface of the chamber C, and the guides I.

It will be noted that bv the structure thus described, the maximum throw of the abutment members J is limited by the length of curved slots f, 4 in the disks while the slidingl parts of the abutment members, to-wlt,

the rollers l and 2 are.` free* to rot-ate, thus" producing the minimum friction and a substantially' tight joint.`

In operation the rotor E is driven by? suitable'fpower source in a counterclockwise direction and the water or other fluidv admit-v ablutmentfintofits-pocket' G in the rotor up toiabutm'entH which :separates the 'intal'i-e B andltheoutlet D;

Various inodiications in the precise shapegv-structure-S and arrangement of thel parts will readily suggest themselves to those skilled in the art, but all within the scope o'l4k the present invention.

Having thus 'fully described my invention, I claim:

l. In a device of the character described, the combination of'a casing, a. rotor having peripheral pockets, abutment members Divotally mounted in said pockets and rollers, disks secured to the ends of said rotor, each of said.V disks being provided with journals to receive abutment pivots, and curved slots adapted to receive the-'endso saidfroller's to maintain said rollers in their' proper positions relative to the abutment mem-bers: and the adjacentl surfaces of' the casin'gand ro-r tor pockets and to lmitthe outwardthrow of said'abutmentsbeyond said pockets;

2. In a device of tlie character described having acasing and a rotor,r an abutment' 

